Clean up and update const / var

test/mjsunit/const-eval-init.js

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 18 matching lines @@
 
 // Test the handling of initialization of deleted const variables.
 // This only makes sense in local scopes since the declaration and
 // initialization of consts in the global scope happen at the same
 // time.
 
 function testIntroduceGlobal() {
   var source =
       // Deleting 'x' removes the local const property.
       "delete x;" +
-      // Initialization turns into assignment to global 'x'.
+      // Initialization redefines global 'x'.
       "const x = 3; assertEquals(3, x);" +
-      // No constness of the global 'x'.
-      "x = 4; assertEquals(4, x);";
+      // Test constness of the global 'x'.
+      "x = 4; assertEquals(3, x);";
   eval(source);
 }
 
 testIntroduceGlobal();
-assertEquals(4, x);
+assertEquals("undefined", typeof x);
 
 function testAssignExistingGlobal() {
   var source =
       // Delete 'x' to remove the local const property.
       "delete x;" +
-      // Initialization turns into assignment to global 'x'.
+      // Initialization redefines global 'x'.
       "const x = 5; assertEquals(5, x);" +
-      // No constness of the global 'x'.
-      "x = 6; assertEquals(6, x);";
+      // Test constness of the global 'x'.
+      "x = 6; assertEquals(5, x);";
   eval(source);
 }
 
 testAssignExistingGlobal();
-assertEquals(6, x);
+assertEquals("undefined", typeof x);
 
 function testAssignmentArgument(x) {
   function local() {
     var source = "delete x; const x = 7; assertEquals(7, x)";
     eval(source);
   }
   local();
-  assertEquals(7, x);
+  assertEquals("undefined", typeof x);
 }
 
 for (var i = 0; i < 5; i++) {
   testAssignmentArgument();
 }
 %OptimizeFunctionOnNextCall(testAssignmentArgument);
 testAssignmentArgument();
-assertEquals(6, x);
+assertEquals("undefined", typeof x);
 
 __defineSetter__('x', function() { throw 42; });
-function testAssignGlobalThrows() {
-  // Initialization turns into assignment to global 'x' which
-  // throws an exception.
-  var source = "delete x; const x = 8";
+var finished = false;
+function testRedefineGlobal() {
+  // Initialization redefines global 'x'.
+  var source = "delete x; const x = 8; finished = true;";
   eval(source);
 }
 
-assertThrows("testAssignGlobalThrows()");
+testRedefineGlobal();
+assertTrue(finished);
 
 function testInitFastCaseExtension() {
   var source = "const x = 9; assertEquals(9, x); x = 10; assertEquals(9, x)";
   eval(source);
 }
 
 testInitFastCaseExtension();
 
 function testInitSlowCaseExtension() {
   var source = "";
   // Introduce 100 properties on the context extension object to force
   // it in slow case.
   for (var i = 0; i < 100; i++) source += ("var a" + i + " = " + i + ";");
   source += "const x = 10; assertEquals(10, x); x = 11; assertEquals(10, x)";
   eval(source);
 }
 
 testInitSlowCaseExtension();
 
 function testAssignSurroundingContextSlot() {
   var x = 12;
   function local() {
     var source = "delete x; const x = 13; assertEquals(13, x)";
     eval(source);
   }
   local();
-  assertEquals(13, x);
+  assertEquals(12, x);
 }
 
 testAssignSurroundingContextSlot();